SEL-2243 Power Coupler
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SEL-2243 Power Coupler - 1

SEL-2243 Power Coupler Every SEL Axion® node requires at least one SEL-2243 Power Coupler module. The SEL-2243 serves two purposes in an Axion system: 1. It is the power supply for all modules installed in the node, and; It provides two dedicated EtherCAT® ports so that multiple Axion nodes can operate together. Front Panel The power coupler module uses the same power supply design that you would find in SEL protective relays. The Axion provides test-proven superior performance and availability, while also allowing for redundant power couplers in a node for applications that need these. If you install two power couplers in a node, both modules actively share load and provide the necessary power for node functions. If one SEL-2243 becomes unavailable, there is zero switching delay or power loss to the node. EtherCAT Operation SEL-2243 Front Panel With RJ45 Connectors Power Supply Operation One SEL-2243 has sufficient power capacity to accommodate an entire Axion node. The terminal strip at the bottom of the unit, as seen in Figure 1, is the connection point for incoming power. All Axion modules have a 55-position IEC C-style connector that provides a communications and power interface to the backplane. The SEL-2243 provides power to the node via the backplane connector. Schweitzer Engineering Laboratories, Inc. Each SEL-2243 provides two dedicated ports for EtherCAT networks. The ports will either be standard 10/100BASE-T or optional 100BASE-FX Ethernet ports. EtherCAT is a real-time fieldbus protocol (see Appendix C in the ACSELERATOR RTAC SEL-5033 Instruction Manual) that we can use to connect an RTAC to I/O modules in an Axion system. If the installation has only one node, then the backplane transmits EtherCAT messages. Alternatively, if you use an SEL-3530 RTAC, or if you need more I/O than will fit in a node, then the ports on a power coupler module provide a mechanism for extending the EtherCAT network through the use of dedicated Ethernet wiring. Refer to EtherCAT in Section 2: Communications in the ACSELERATOR RTAC SEL-5033 Instruction Manual to learn more about configuring a network. If an Axion node contains two SEL-2243 modules, then the EtherCAT ports in both power couplers will operate normally even if one power supply becomes unavailable. The remaining power supply will serve as the source for all I/O modules and communications needs.

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SEL-2243 Power Coupler - 2

Mechanical Installation Each SEL-2242 chassis/backplane has ten slots, labeled A through J. Only slots A, B, and C support the SEL-2243 Power Coupler module. Final Module Alignment Connections Power ! Notch for Module Alignment To install the power coupler, tip the top of the module away from the chassis, align the notch on the bottom of the module (shown in Figure 2) with the slot you have selected in the chassis, and place the module on the bottom lip of the chassis as Figure 3 illustrates. The module is aligned properly when it rests entirely on the lip of the chassis. Contact with this...

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SEL-2243 Power Coupler - 3

Buttons and LEDs Each power coupler includes a LAMP TEST button useful for system testing. When depressed, all module LEDs on the terminal side and front panel (rack mount only) will illuminate. The green LED labeled POWER on the SEL-2243 will illuminate if incoming power is present and the power supply is operating normally. The LEDs labeled ENABLED and ALARM are related to EtherCAT network operation. The green ENABLED LED will illuminate when the module is operating normally on the network. The ALARM LED will illuminate during network initialization or when there is a problem with the...

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SEL-2243 Power Coupler - 4

IEC 60255-5:2000 Severity Level: 500 V for greater than 1 minute EMC Immunity Electrostatic Discharge Immunity: Common Mode IEC 61000-4-16:2002 Disturbance Immunity: Frequency: 0 to 150 Hz Severity: Level 4, segment 4: 30 Vrms open-circuit, 15 to 150 kHz IEEE C37.90.3-2001 IEC 60255-22-2:2008 IEC 61000-4-2:2008 Severity Level: 4 8 kV contact discharge 15 kV air discharge IEEE C37.90.2-2004 Severity Level: 35 V/m IEC 61000-4-3:2010 Severity Level: 10 V/m IEC 60255-22-3:2007 Severity Level: 10 V/m Digital Radio Telephone RF Immunity: Radiated and Conducted Emissions: This product was designed...

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